Body Systems End of Unit Challenge

Your blood transports all of the following to and from the cells of your body except:

• Nutrients

• Hormones

• Oxygen

• Neurotransmitters

Answer explanation

The correct answer is Neurotransmitters. Blood transports nutrients, hormones, and oxygen to and from the cells of the body. However, neurotransmitters, which are chemical messengers used by the nervous system, are not transported by blood. They are typically released directly across a synapse to their target cells.

Of the different blood vessels, the largest blood vessels are _____________, which carry blood away from the heart.

• Arteries

• Veins

• Capillaries

• Venules

The inside of your bones contain this, which creates red blood cells and stores fat.

• Bone marrow

• Bone Cartilage

• Bone Capillaries

• Bone Bile

The actual color of blood that is oxygen poor (also known as deoxygenated blood) is:

• Red

• Blue

Answer explanation

The actual color of blood that is oxygen poor, or deoxygenated, is red. Although it is commonly thought to be blue, this is a misconception. Deoxygenated blood is a darker shade of red compared to oxygen-rich blood, which is bright red.

When a group of red blood cells stick together, it is called a thrombosis, which we often refer to as a blood _________.

• Clot

• Contusion

• Stroke

• Laceration

The heart pumps of the average person approximately _____ times per day.

• 10,000

• 100,000

• 25,000

• 150,000

Your heart is made up of what kind of muscle tissue?

• Cardiac

• Smooth

• Skeletal

• Circulatory

While there is more than one organ between the digestive and excretory systems that help filter waste, this organ is responsible for the most filtering of your blood, keeping it free of waste.

• Kidneys

• Bladder

• Lungs

• Liver

What is the name of the organ that the arrow is pointing at? (Hover mouse over image to enlarge).

• Pancreas

• Appendix

• Small intestine

• Gallbladder

What is the name of the organ that the arrow is pointing at? (Hover mouse over image to enlarge).

• Large Intestine

• Appendix

• Bronchi

• Small Intestine